George said:I have never tried this but I feel a good black tire with an inflated tube would probably give you about a 4 to 5 degree temp rise so if you are in an area with daytime temps at or around freezing it would probably help but I would not count on anything more.
I have noticed that tractor duals will have the snow melted around them so I'm sure they do collect and hold some heat but I'm not sure it is enough to be of help.